Keithley 2651A, Справочное руководство

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Section 9
Frequently asked questions (FAQs)
In this section:
How do I optimize performance? .............................................. 9-1
How do I upgrade the firmware? .............................................. 9-2
How do I use the Digital I/O port? ............................................ 9-2
How do I trigger other instruments? ......................................... 9-2
How do I generate a service request? ...................................... 9-3
How do I store measurements in nonvolatile memory? ............ 9-4
When should I change the output off state? ............................. 9-5
How do I make contact check measurements? ........................ 9-5
How do I optimize performance?
There are three primary factors that affect measurement accuracy and speed:
•
Warm-up:
For rated measurement accuracy, allow the Model 2651A to warm up for at least two
hours before use.
•
Speed setting:
The Speed setting affects both speed and accuracy (see Setting speed (on page
9-1)).
•
Autozero:
Autozero can be disabled to increase speed at the expense of accuracy (see
Disabling autozero to increase speed (on page 9-1)).
Setting speed
To set speed from the front panel:
Press the
SPEED
key, and then choose the setting based on your requirements:
•
Choose the
FAST
setting for the fastest measurements (note that measurement accuracy will be
reduced).
•
For best accuracy, use the
HI-ACCURACY
setting (note that speed will be reduced).
•
To balance accuracy and speed, use the
MED
or
NORMAL
setting.
For additional information, including the OTHER setting and remote configuration, refer to Setting
speed (on page 2-72).
Disabling autozero to increase speed
In certain measuring situations, disabling autozero (setting it to OFF) can increase measurement
speed. If autozero is disabled, accuracy will drift with time and temperature.